Utility knife



FIG. 1 is a front elevational view of a utility knife showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view, the opposite side being a mirror image thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is an enlarged cross-sectional view taken along line 6--6 of FIG. 4; and

FIG. 7 is an enlarged cross-sectional view taken along line 7--7 of FIG. 4. 

The ornamental design for a utility knife, as shown and described. 